Exhibit 99.1

                              FOR IMMEDIATE RELEASE

Contact: Michael Gury                               Jodi Amendola
         IMS HEALTH Communications                  TriZetto Communications
         (203) 222-4230                             (480) 657-9966

         Jack Walsh                                 Ethan Denkensohn
         IMS HEALTH Investor Relations              TriZetto Investor Relations
         (203) 222-4250                             (212) 213-0006

IMS HEALTH TO MERGE WITH TRIZETTO, CREATING THE GLOBAL LEADER IN
INTERNET-ENABLED HEALTHCARE INFORMATION

WESTPORT, CT and NEWPORT BEACH, CA, March 29, 2000 - IMS HEALTH (NYSE: RX), the
world's leading provider of information solutions to the pharmaceutical
industry, and The TriZetto Group, Inc. (NASDAQ:TZIX), a leader in providing
Internet-enabled application services and healthcare business portals, today
jointly announced a strategic merger that will create the global leader in
business-to-business eHealthcare information services.

      The new company will leverage Internet technology to provide integrated,
digital health information and application services to healthcare constituents
worldwide. HealthWebSM, a global business-to-business Internet portal, enables
healthcare providers, payors, and pharmaceutical companies to access
applications, information, and e-commerce services seamlessly. By applying the
company's domain expertise coupled with eTechnologies, customers can bridge the
information gap in healthcare. With pro forma market capitalization of
approximately $10 billion, the new company will operate in more than 100
countries with over 9,000 employees.


      Under the terms of a definitive merger agreement unanimously approved by
the boards of directors of both companies, IMS HEALTH shareholders will receive
0.4655 shares of TriZetto for each IMS HEALTH common share. With TriZetto as the
legal acquirer, the transaction will be accounted for as a purchase and is
expected to be tax-free to the shareholders of both companies. Based on
TriZetto's closing share price yesterday, the transaction currently values IMS
HEALTH at $27.03 per share.

      Upon completion of the merger, the new company plans to issue three
securities to all investors. First, IMS HEALTH trading NYSE (RX), representing
the core IMS pharmaceutical market research and sales management businesses,
will be issued as a tracking stock. Second, TriZetto, trading Nasdaq (TZIX), the
high-growth application services provider (ASP) and Internet portal business,
will be combined with Erisco, a provider of technology solutions supporting 70
million managed care lives. Third, a new security, Strategic Technologies, a
leader in pharmaceutical relationship management, will be structured as a
tax-free spin-off. Accordingly, current shareholders of both IMS HEALTH and
TriZetto will ultimately own three securities: IMS HEALTH, TriZetto, and
Strategic Technologies.

      "The Internet is transforming healthcare," said Victoria R. Fash, IMS
HEALTH chief executive officer. "Our vision is to leverage technology to enable
information-based B2B e-commerce across the global healthcare system, ultimately
advancing world health. Our strategy is TriZetto technology as the eBusiness
engine, driving IMS digital assets linked by the HealthWeb global portal. With
today's announcement we create a new online/offline business model, combining
high growth with financial sustainability."


      "To operate efficiently, healthcare businesses need best-of-breed
software, Internet-enabled connectivity and insights for decision-making," said
Jeffrey H. Margolis, TriZetto chairman and chief executive officer. "The key to
effective use of the Internet is ensuring that healthcare enterprises have
integrated technology, applications and information access on a reliable,
scalable and cost-predictable basis. Our merger with IMS HEALTH will enable
TriZetto to deliver best-of-breed ASP solutions worldwide."

      The executive management team will include Robert E. Weissman, chairman;
Victoria R. Fash, chief executive officer; and Jeffrey H. Margolis, vice
chairman and president.

      The Board of Directors will have nine members: Weissman, Fash, Margolis,
and six independent directors, three designated by each company.

      The transaction is expected to be completed in the third quarter of 2000,
subject to regulatory approvals, approval by the shareholders of both companies
and customary closing conditions. Shareholders representing in excess of a
majority of TriZetto shares have already agreed to approve the transaction.

      Goldman Sachs served as financial advisor to IMS HEALTH and Warburg Dillon
Read served as financial advisor to TriZetto.

      A conference call with the executive management team will be Webcast at 9
A.M. U.S. Eastern Time, today, Wednesday, March 29, 2000, and can be accessed
via IMS HEALTH and TriZetto Web sites, as well as http://www.triims.com.


ABOUT TRIZETTO

      The TriZetto Group, Inc. is a leading provider of vertical,
Internet-enabled application services and business portals for the healthcare
industry. As an application services provider (ASP), TriZetto hosts software for
a predictable monthly fee, saving customers significant time, money and
frustration. HealthWebSM, its Internet portal, assists healthcare administrators
and professionals in performing their routine tasks and facilitates
information-exchange and e-commerce among all key healthcare participants:
providers, health plans and employers and health-plan members. Additional
information is available at HTTP://WWW.TRIZETTO.COM.

ABOUT IMS HEALTH

      IMS HEALTH is the world's leading provider of information solutions to the
pharmaceutical and healthcare industries. With $1.4 billion in 1999 revenue, IMS
HEALTH operates in over 100 countries. IMS HEALTH is the largest pharmaceutical
manufacturer information partner, with over 40 years' experience in the
industry. Key products and services integral to customer day-to-day operations
include: market research for prescription and over-the-counter pharmaceutical
products; sales management information to optimize sales force productivity;
pharmaceutical relationship management solutions for sales and marketing
decision-making; and technology systems and information services that support
managed care organizations. Additional information is available at
http://www.imshealth.com.

                                       ###

MARCH 29, 2000

THIS PRESS RELEASE MAY CONTAIN FORWARD-LOOKING INFORMATION (STATEMENTS THAT ARE
NOT HISTORICAL FACTS AND RELATE TO FUTURE PERFORMANCE) THAT INVOLVES RISKS AND
UNCERTAINTIES. THE FORWARD-LOOKING STATEMENTS ARE


MADE PURSUANT TO THE SAFE HARBOR PROVISIONS OF THE PRIVATE SECURITIES LITIGATION
REFORM ACT OF 1995. THESE FORWARD-LOOKING STATEMENTS MAY INCLUDE STATEMENTS
ABOUT FUTURE NET REVENUES, PROFITS, AND FINANCIAL RESULTS, THE MARKET FOR
TRIZETTO'S SERVICES, FUTURE SERVICE OFFERINGS, CLIENT AND PARTNER RELATIONSHIPS,
AND TRIZETTO'S OPERATIONAL CAPABILITIES. ACTUAL RESULTS MAY DIFFER MATERIALLY
FROM THOSE STATED IN ANY FORWARD-LOOKING STATEMENTS BASED ON A NUMBER OF
FACTORS, INCLUDING THE EFFECTIVENESS OF TRIZETTO'S IMPLEMENTATION OF ITS
BUSINESS PLAN, THE MARKET'S ACCEPTANCE OF TRIZETTO'S SERVICES, RISKS ASSOCIATED
WITH MANAGEMENT OF GROWTH, RELIANCE ON THIRD PARTIES TO SUPPLY KEY COMPONENTS OF
TRIZETTO'S SERVICES, ATTRACTION AND RETENTION OF EMPLOYEES, VARIABILITY OF
QUARTERLY OPERATING RESULTS, INCLUDING THE EFFECTS OF THE CLIENT PURCHASING
PATTERNS DUE TO YEAR 2000 ISSUES, COMPETITIVE FACTORS, RISKS ASSOCIATED WITH
ACQUISITIONS, CHANGES IN DEMAND FOR THIRD PARTY PRODUCTS OR SOLUTIONS, WHICH
FORM THE BASIS OF TRIZETTO'S SERVICE OFFERINGS, AND RISKS ASSOCIATED WITH
RAPIDLY CHANGING TECHNOLOGY, AS WELL AS THE RISKS IDENTIFIED IN TRIZETTO'S SEC
FILINGS, INCLUDING INFORMATION UNDER THE HEADING OF RISK FACTORS IN ITS FORM S-1
FILED IN OCTOBER 1999.

THIS PRESS RELEASE INCLUDES STATEMENTS WHICH MAY CONSTITUTE FORWARD-LOOKING
STATEMENTS MADE PURSUANT TO THE SAFE HARBOR PROVISIONS OF THE PRIVATE SECURITIES
LITIGATION REFORM ACT OF 1995. ALTHOUGH IMS HEALTH BELIEVES THE EXPECTATIONS
CONTAINED IN SUCH FORWARD-LOOKING STATEMENTS ARE REASONABLE, IT CAN GIVE NO
ASSURANCE THAT SUCH EXPECTATIONS WILL PROVE CORRECT. THIS INFORMATION MAY
INVOLVE RISKS AND UNCERTAINTIES THAT COULD CAUSE ACTUAL RESULTS OF IMS HEALTH TO
DIFFER MATERIALLY FROM THE FORWARD-LOOKING STATEMENTS. FACTORS WHICH COULD CAUSE
OR CONTRIBUTE TO SUCH DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO (I) THE RISKS
ASSOCIATED WITH OPERATING ON A GLOBAL BASIS, INCLUDING FLUCTUATIONS IN THE VALUE
OF FOREIGN CURRENCIES RELATIVE TO THE U.S. DOLLAR, AND THE ABILITY TO
SUCCESSFULLY HEDGE SUCH RISKS, (II) TO THE EXTENT IMS HEALTH SEEKS GROWTH
THROUGH ACQUISITIONS AND JOINT VENTURES, THE ABILITY TO IDENTIFY, CONSUMMATE AND
INTEGRATE ACQUISITIONS AND VENTURES ON SATISFACTORY TERMS, (III) THE ABILITY TO
DEVELOP NEW OR ADVANCED TECHNOLOGIES AND SYSTEMS FOR ITS BUSINESSES ON TIME AND
ON A COST-EFFECTIVE BASIS, (IV) REGULATORY, LEGISLATIVE AND ENFORCEMENT
INITIATIVES, PARTICULARLY IN THE AREAS OF MEDICAL PRIVACY AND TAX, AND (V)
DETERIORATION IN ECONOMIC CONDITIONS, PARTICULARLY IN THE PHARMACEUTICAL,
HEALTHCARE OR OTHER INDUSTRIES IN WHICH IMS HEALTH'S CUSTOMERS OPERATE.
ADDITIONAL INFORMATION ON FACTORS THAT MAY AFFECT THE BUSINESS AND FINANCIAL
RESULTS OF THE COMPANY CAN BE FOUND IN FILINGS OF THE COMPANY MADE FROM TIME TO
TIME WITH THE SECURITIES AND EXCHANGE COMMISSION.